I bet you're doing fine, Olivia. Yes, pay attention to those things, they matter, but don't let worrying overwhelm you. Being out means being read. If you're truly trying to blend, (presentation age and venue appropriate, behavior likewise) getting read almost never matters. You might get a smirk or a chuckle, but that's about it. Most people, by far, either won't pay much attention, or will treat you as the person you're presenting. It won't take long and you're going to notice that what I'm saying is true.
Now, get out there and have some fun.